package com.hmdp.utils;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@Component
public class RedisIdWorker {
    private static final long BEGIN_TIMESTAMP = 1640995200L;
    private static final long CONUT_BITS=32;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    public long nextId(String keyPrefix ) {
        //生成时间戳
        LocalDateTime now = LocalDateTime.now();
        long nowSecond=now.getSecond();
        long timestamp=nowSecond-BEGIN_TIMESTAMP;

        //生成序列号
        //获取当前日期
        String date=now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long count=stringRedisTemplate.opsForValue().increment("icr:"+keyPrefix+":"+date);
        //拼接并返回
        return timestamp<<CONUT_BITS| count;
    }
    public static void main(String[] args) {
        LocalDateTime time = LocalDateTime.of(2022,1,1,0,0);
        long second=time.toEpochSecond(ZoneOffset.UTC);
        System.out.println(second);

    }
}
